Accumulated Other Comprehensive Loss - Changes in Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 874	$ 634	$ 756
Net current period other comprehensive income (loss)	(9)	51	16
Ending Balance	1,233	874	634
Pension and OPEB liability adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	5	(17)	(19)
Other comprehensive income (loss) before reclassifications	3	39	12
Amounts reclassified from AOCL	(12)	(10)	(9)
Income tax benefit (expense)	2	(7)	(1)
Net current period other comprehensive income (loss)	(7)	22	2
Ending Balance	(2)	5	(17)
Interest rate swaps
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	15	(24)	(46)
Other comprehensive income (loss) before reclassifications	7	44	14
Amounts reclassified from AOCL	(12)	6	15
Income tax benefit (expense)	1	(11)	(7)
Net current period other comprehensive income (loss)	(4)	39	22
Ending Balance	11	15	(24)
Foreign currency items
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(42)	(32)	(24)
Other comprehensive income (loss) before reclassifications	2	(10)	(8)
Net current period other comprehensive income (loss)	2	(10)	(8)
Ending Balance	(40)	(42)	(32)
Accumulated Other Comprehensive Loss, net of tax
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(22)	(73)	(89)
Other comprehensive income (loss) before reclassifications	12	73	18
Amounts reclassified from AOCL	(24)	(4)	6
Income tax benefit (expense)	3	(18)	(8)
Net current period other comprehensive income (loss)	(9)	51	16
Ending Balance	$ (31)	$ (22)	$ (73)